Re: [Qemu-discuss] qemu -cpu host

[akhilesh rawat]

hi,

I am using libvirt tool to create instance like below
 virt-install --virt-type kvm --name compute-0 --cpu host --ram=61440  ....

And when i check the KVM  process under host this which is doing this Job ..it as as below

usr/libexec/qemu-kvm -name compute-0 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu SandyBridge,+vme,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor,+ds_cpl,+vmx,+smx,+est,+tm2,+xtpr,+pdcm,+pcid,+dca,+osxsave,+arat,+xsaveopt,+pdpe1gb -m 61440

On Mon, Feb 6, 2017 at 4:59 PM, Narcis Garcia <address@hidden> wrote:

How did you get that translation from "qemu -cpu host" to "...-cpu
SandyBridge,+vme,+ds,+acpi,+ss,..." ?


El 06/02/17 a les 12:15, akhilesh rawat ha escrit:
> thanks , but if you see the guest which was run as
>
>
>     qemu -cpu host
>
>
> has auto generated model as SandyBridge in KVM process.
>
>  usr/libexec/qemu-kvm -name compute-0 -S -machine
> pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu
> SandyBridge,+vme,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor,+ds_cpl,+vmx,+smx,+est,+tm2,+xtpr,+pdcm,+pcid,+dca,+osxsave,+arat,+xsaveopt,+pdpe1gb
> -m 61440
>
> So now  running  "--cpu SandyBridge" will make any difference
>
>
>
>
> On Mon, Feb 6, 2017 at 4:28 PM, Vincenzo Romano
> <address@hidden <mailto:vincenzo.romano@notorand.it>> wrote:
>
>     2017-02-06 11:36 GMT+01:00 akhilesh rawat
>     <address@hidden <mailto:akhileshrawat007@gmail.com>>:

>     >
>     > processor    : 19
>     > vendor_id    : GenuineIntel
>     > cpu family    : 6
>     > model        : 42
>
>     Hmmm. your guest CPU is a different model form the host one.
>
>     Would you please:
>
>     - try forcing "SandyBridge" cpu (that'd be your Intel Xeon E312xx)
>     instead of host and
>     - check the "Recognized CPUID flags" from the output of
>     "qemu-system-x86_64 -cpu help" ?
>
>     --
>     Vincenzo Romano - NotOrAnd.IT
>     Information Technologies
>     --
>     NON QVIETIS MARIBVS NAVTA PERITVS
>
>